Guillaume Lavoie Ste-Marie

Stephan H. Trihey’s practice is focused on commercial and civil litigation, insurance and construction law, commercial real estate, shareholder remedies and estate litigation. He brings over 20 years of experience as a trial lawyer, as counsel for domestic and international corporations, as well as insurers, and as an public sector advocate, having represented universities and Crown corporations. He routinely advises clients on complex and contentious issues, with the goal of either fin...

Martin Côté is a Partner in our Civil and Commercial Litigation Group. His practice focuses primarily on civil, commercial and real estate litigation, as well as provisional measures such as injunctions and cases with international aspects raising questions on the applicable legislation, the jurisdiction of the courts and the enforcement of foreign decisions. Martin Côté is also committed to the future of RSS as a member of the Management Committee, after having been...

Jonathan Warin is a member of the firm's Commercial Litigation Group and specializes in bankruptcy and insolvency, extraordinary remedies and realizing on security. He regularly intervenes in various insolvency cases, whether to represent institutional lenders, trustees or debtors in a restructuring and liquidation context. Mr. Warin also handles commercial litigation cases of all kinds, particularly shareholder remedies and injunctions. Mr. Warin is Head of Practice Litigation and Conflict R...

David Turgeon is the leader of the Global Intellectual Property group, a lawyer and a patent agent. He represents clients before different courts, protects their inventions through patents and provides strategic advice. David represents clients operating in a variety of industries, more particularly the life sciences (namely biologics), biomedical devices and manufacturing sectors. David specializes in high-stakes patent litigation involving clients’ flagship products. As lead counsel o...

Paul Cabana’s practice focuses on tax law and covers both income tax and commodity taxes, including customs law. Paul advises both Canadian and foreign businesses in the course of their various transactions and current operations, as well as in the context of disputes with the tax authorities. He is regularly involved in mergers and acquisitions, corporate reorganizations, real estate transactions, audits, objections and appeals. Paul also helps employers navigate their tax obligations,...

Pascal de Guise is a top attorney recognized by Best Lawyers in the practice area(s) of Corporate Law, Securities Law and Venture Capital Law. Pascal, who practices law in Montréal, Quebec, has been recognized since 2018. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Pascal is held by other top lawyers in the same geographic and legal practice area.

Louis Tassé is a top attorney recognized by Best Lawyers in the practice area(s) of Tax Law. Louis, who practices law in Montréal, Quebec, has been recognized since 2020. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Louis is held by other top lawyers in the same geographic and legal practice area.

Marie-Claude Marcil is a partner in the Tax group of the Montréal office. With over 15 years of experience in tax litigation and dispute resolution, clients turn to her extensive experience in cases involving specific and general anti-avoidance rules, transfer pricing, acquisitions of control, deductibility of business expenses, employer payroll taxes, taxation of financial institutions, imposition of penalties, and scientific research and experimental development (SR&ED). She also...

As a member of the administrative law team, Raymond Doray heads the information law practice and, more particularly, is involved in issues pertaining to access to information, privacy and defamation, as well as the application of the Canadian and Quebec charters of rights and freedoms. He is also specialized in constitutional law. Over the past few years, Mr. Doray has represented many public, private and media organizations before the courts in cases involving the confidentiality of document...

Paul Gagnon is a top attorney recognized by Best Lawyers in the practice area(s) of Information Technology Law and Technology Law. Paul, who practices law in Montréal, Quebec, has been recognized since 2026. This recognition is based on an exhaustive peer-review survey, reflecting the high esteem in which Paul is held by other top lawyers in the same geographic and legal practice area.